Question

Match the following:  

List-I 
A. Rhamphotheca 
B. Precocial hatchlings 
C. Absence of renal portal system 
D. Hyomandibula 

List-II 
I. Mammals 
II. Beak of birds 
III. Columella auris 
IV. Flightless birds 
V. Dentary

• A. A-II, B-V, C-I, D-III
• B. A-II, B-IV, C-I, D-III
• C. A-V, B-IV, C-III, D-I
• D. A-IV, B-III, C-II, D-I

Hint:

Rhamphotheca = bird beak covering, Hyomandibula = Columella auris, and mammals lack a renal portal system.

Answer 1

The Correct Option is B

Concept: Several anatomical and physiological characteristics are useful for distinguishing vertebrate groups.

Step 1: Match Rhamphotheca. Rhamphotheca is the horny sheath covering the beak of birds. \[ A \rightarrow II \]

Step 2: Match Precocial hatchlings. Precocial hatchlings are well developed at the time of hatching and can move independently. Such hatchlings are common in flightless birds. \[ B \rightarrow IV \]

Step 3: Match absence of renal portal system. The renal portal system is absent in mammals. \[ C \rightarrow I \]

Step 4: Match Hyomandibula. Hyomandibula is modified into the middle ear bone called columella auris. \[ D \rightarrow III \]

Step 5: Final matching. \[ A-II,\quad B-IV,\quad C-I,\quad D-III \] Hence option (B) is correct.